A computer is, at its core, just a bunch of transistors wired together. Once you have enough transistors on a board, though, one of the first layers of abstraction that arises is the Arithmetic Logic ...

The Youtuber Shadowman39 has built a functional, mechanical 8-bit computer with the construction toy for roller coasters and towers K'nex. The machine can process binary numbers between 0 and 255 or ...